Reasons for Quicken CC-501 error:
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The major reason for the error is a fault in your bank server.
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A virus or malware attack damaged your company files.
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While resetting the express web connect in Quicken.
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Using an older Quicken version.
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Incorrect bank credentials can also provoke the error code cc-501.

Things to remember before solving Quicken Error CC-501:
Take a backup of the Quicken data file:
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Open Quicken and then go to the Backup menu.
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Then click on the Restore option followed by Backup Quicken File.
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At last, click on Backup Now.
Make sure transactions don’t get added.
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Open Quicken first.
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Then, click on the Edit menu and click on Preferences.
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Click on Downloaded Transactions from the drop-down menu.
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Unmark the add to banking register checkbox.
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At last, select OK.

Methods to fix this Quicken error.
Method 1: Updating the account.
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Open Quicken and connect the account facing the error.
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Refresh the bank account settings.
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Click on the account name and then select the drop-down arrow.
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Select the update option, this will refresh the account settings.
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Then enter your Quicken login credentials
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A new window will appear with step update settings.
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Click on update now.
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A new window will appear to change the password.
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Click on OK after changing the password.
Method 2: Deactivate the account
- Open the account having the Quicken CC-501 error, and edit it.
- Click on Online Services.
- Next click on deactivate and press yes to confirm.
- After deactivation of the account, go to the online setup tab and then set up now.
- Select Ok and done.
- Click the Validate file and then ok
- Go back to the tools and the to-account list.
- Enter the account, then online services>>Set up.
- Enter the login credentials of your bank.
- Select on connect.
Method 3 – Reactivate the Account
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Go to Tools > Add Account…
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Then select the type of an account such as Checking, Savings, etc.
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Now click on Advanced Setup(to the bottom left corner)
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Now type the name of your bank/financial institution
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Then click Next
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Select a suitable connection method and click Next
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Now enter the bank Username and Password
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Then click Connect
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Now Quicken starts to look up your accounts at a bank
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Once you can see the list of your accounts, it’s time to reactivate account(s)
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Instead of adding the accounts again, you need to LINK it with an existing account in Quicken(See an image below)
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Then click Next and Finish with resolved Quicken cc 501 error
Method 4: Update account details.
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Open the transaction register facing the Quicken CC-501 error.
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Click on the gear icon at the right corner and select update now.
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After that follow the instructions to com[lete the process.
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Refresh Quicken and check if the error still exists.
Method 5: Update account status.
- Click Tools and the online center.
- You will find wrong transactions listed under the transactions list.
- Go to the transactions listed and cut them.
- Then do an online update of your account.
- After that, reconcile your account and see if the red flag is still present.
- If there is no red flag your account is error-free.
Method 6: Resting CC Credentials
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Select tools and then the online center.
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Press shift+click to open recent cc credentials.
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Follow the instructions to reset credentials.
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Once done, relaunch Quicken and open your account.
Method 7: Reinstall Quicken
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Press windows+ R and type “appwiz.cpl” in the field and hit enter.
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Find the Quicken entry and then right-click on it.
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Click on uninstall and then ensure that temporary files are removed.
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Then download and reinstall Quicken.
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After that, enter your account details and check if the error still exists or not.
Method 8 – If you receive this error (Quicken cc 501) while adding an account
You may receive this error when adding a bank account to Quicken. Chances are that your bank is facing temporary issues which may take up to 24-48 hours to resolve.
We advised that you wait a bit and then try adding a bank account. If the same thing happens again, please continue with the methods below to fix it.
Method 9 – If you receive this error while updating your account
If you receive this error while updating bank accounts. You may need to contact Quicken official support and have a technician review the data file log.
We also recommend that you try Method 5 before contacting Quicken Support. It may help to solve this problem of Quicken cc 501.
Method 10 – Clean junk file
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Click on the start button
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Type command in the search box
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Hold the keys CTRL + SHIFT
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Click Yes
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Then type cleanmgr’ and press enter
These are some best methods to resolve your Quicken problem. Hope you will find this helpful.