8 programs wont uninstall

Go back with system restore. The use of Ccleaner will help improve performance.

maintain your computer

Follow this procedure

10 Tips on How to Properly Maintain Your Computer
ignore, reg cleaners.

Steps that I did not notice on the guide include:

Running a scan disc before doing a defrag

Using Microsoft Security Essentials and Malwarebytes.

Making System Restore points, at least once a week

Makaing a system Image once a month (varies by user)

Not relying on your A/V common sense, should prevail. You know of many sites can cause a problem.

Do not use any reg cleaning or optimizing software.

Download and use Ccleaner about once every two months. Untick any registry entries.
http://www.piriform.com/

Download and use PSI, to to be sure that all of your software is up to date
http://secunia.com/vulnerability_scanning/personal/

If you follow these instructions, you will be trouble free for a long time to come.

Be sure to back up your hard drive about once a month (varies by user) and to keeep system restore points up to date.

Optimize Windows 7

http://windows.microsoft.com/en-US/w...er-performance

Use what you have. If it works. Just follow my maintenance schedule. No need for anything else.

Most of these errors are probably coming from other Tweaks you've used "Taskbar Tweaker" just as an example
Because most of the errors are not really (windows installer) boxes they are indeed altered to show source... dialog which does not exist in a traditional uninstall process

With that in mind you might have to review your register tweaking utilities help files,
Cheers.
Fix problems that programs cannot be installed or uninstalled

Glad that it worked out. From now on follow the instructions in my post. Your computer will always work the way it should

Good deal,
Get what ever tweak out of the windows installer and you should be fine,

Rich is a wise Panda good advice except for ccleaner
It's all good though
Cheers.