Hello,
Thank you for posting your question on Microsoft community.
I would like to know some information about the issue so that we could help you better.
Did you make any hardware changes to your computer prior to the issue?
I appreciate you for providing details about the issue and your efforts towards resolving it.
This issue may occue due to incorrect registy settings.
I would suggest you to check registry settings and make changes in them if there is any variations in the default values.
You may change them to the default value and check if it helps. Please follow these steps:
a. Press Windows + R keys, type regedit in run window and press Enter.
b. Locate and navigate to the following registry sub-key:
HKEY_CURRENT_USER\Control Panel\Desktop
c. In the right pane, you may find "Foreground Flash Count" and "Foreground Lock timeout" keys.
d. Please refer the following articles and check for the default values of "Foreground Flash Count" and "Foreground Lock timeout" registry keys.
Refer:
ForegroundFlashCount
http://technet.microsoft.com/en-us/library/cc957205.aspx
ForegroundLockTimeout
http://technet.microsoft.com/en-us/library/cc957208.aspx
e. If the values differ from the default values, you may double click the names and change the values. Make sure you make the decimal selection and then change the values.
Note: Serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs.
For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
http://support2.microsoft.com/kb/322756
I hope this information helps.
Please do let us know if you need any further assistance.
Thank you