When computer, or PC, was used for months, the system will need to be tuneup. Just like a new car, after few month driving, it have to be sent to dealer garage to get a adjustment.
AVG PC Tuneup 2011 is a good tool. I just use a free trial one hour ago.
You can see the problems or issues AVG PC Tuneup found from my computer below.
Boost your Internet speed
Fine tune your PC’s Internet settings to maximize your speed online.
Eliminate freezing and crashing
Fix cluttered and corrupted registries that consume memory, slow applications down, and cause overall stability problems.
Optimize disk speeds
Optimize your file system to get the most out of your hard drive, ensuring faster disk speeds and improved PC performance.
Protect your privacy
Remove all records of your online and offline PC activities to preserve your privacy.
Recover accidentally deleted files
Recover important files that have been damaged or accidentally deleted.
Permanently delete files and wipe disks
Prevent your personal data from getting into the wrong hands by permanently deleting files and ensuring they can’t be restored or accessed without your permission.
Monitor hard drive health and space
Keep your data organized and safe from accidental loss or hard drive