Q: I'm unable to access the iTunes or iCloud programs on my Dell Windows 7 PC. Apple representatives who tried to help me said their efforts were blocked by a program on my PC called Revo Uninstaller, which I haven't been able to remove. What can I do?
Pat Becker, Tucson, Ariz.
A: To make sure your problem isn't caused by malicious software, run the free Malwarebytes security program (tinyurl.com/jsdacdk). For best results, opt out of trying the premium version (see tinyurl.com/lpq5fmd).
If that doesn't solve the problem, you have two options for getting rid of the Revo Uninstaller.
Option 1: Run the Windows 7 System Restore program. System Restore will return your PC settings to an earlier date, and at the same time will uninstall any program you added to your PC after that date. To use System Restore, see tinyurl.com/kxanto5, then scroll down to "How To Use System Restore in Windows 7 or Windows Vista."
Note: In order for System Restore to eliminate Revo from your PC, you must pick a restore point whose calendar date precedes the installation of the Revo program. If you don't have any restore points that go back that far, or if System Restore wasn't turned on, try option two.
Option 2: Back up all your personal PC data to an external hard drive or flash drive. Then use the Windows 7 installation disk that came with your PC to reinstall Windows on your PC.
If you don't have such a disk, you can download a new copy of Windows 7 from Microsoft — provided that you have the "product key" (also called a "product activation key") for your current copy of Windows. To find the installation key, see tinyurl.com/jutdkdf. To download a new copy of Windows 7, see tinyurl.com/q7p2g7e.