missing Windows Sidebar. C: Program Files Application not found.

10 days ago everything worked fine, but now even if I want to customize my dock or I use D T the Application C:/Program Files etc not found keep appearing. Also, whenever I click on Google Chrome or IE etc etc, I get a box popping up that are asked to choose a program I want to open the file... Sidebar is gone too. Help!

Hello
 
1. don't you make changes before the show?
 
As you have several questions on the computer, we recommend that you restore the computer to an earlier time when it worked very well for this problem. To restore the computer to an earlier time, try the following steps.
1. Click Start, type system restore, click System Restore in the list.
2. choose the appropriate date when the computer was working fine.
3. follow the instructions in the wizard to complete the system restore process.
4 restart the computer and check if everything is OK.
 
For more information about system restore, see this link:
http://Windows.Microsoft.com/en-us/Windows-Vista/what-is-system-restore
 
We also recommend online virus scanner to delete all computer infections: http://onecare.live.com/site/en-us/default.htm
 
I hope this helps.
 
Kind regards
Syed
Answers from Microsoft supports the engineer.

Tags: Windows

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