1. A lot of my programs no longer appear under my "add or remove programs" and the ones that do, do not show the options of adding, removing or changing".2. I can no longer delete any sites I had previously saved in "Favourites".3. Under "startup" all tHat is showing is "my Compaq Connections" (Compaq is my computer make).4. My computer is running slower and slower and I don't know why.

Hi,1. Did you make any changes to the computer recently?2. Do you suspect any virus acticity?3. Which windows component is not working properly?Method 1.I would ask you to run the online virus scan and check. Sometimes the installed security program might not be just enough. I also recommend you to update your security software regularly.a. Follow the link below to run the free online scan:http://onecare.live.com/site/en-us/default.htmb. Run the Microsoft Malicious Removal Tool.Microsoft Malicious Removal Tool - 32 bithttp://www.microsoft.com/downloads/details.aspx?FamilyID=AD724AE0-E72D-4F54-9AB3-75B8EB148356&displaylang=enMicrosoft Malicious Removal Tool - 64 bithttp://www.microsoft.com/downloads/details.aspx?FamilyId=585D2BDE-367F-495E-94E7-6349F4EFFC74&displaylang=enAlso I would recommend you to install the free security software from Microsoft. Which is easy to install and updates automaticallyHere is the link to download it.http://www.microsoft.com/securepcMethod 2.Run the sfc scan and check if there are any system file corruptions.a. To do this, click Start, click All Programs, click Accessories, right-click Command Prompt, and then click Run as administrator. If you are prompted for an administrator password or for a confirmation, type the password, or click Allow.b. Type the following command, and then press ENTER: sfc /scannowThe sfc /scannow command scans all protected system files and replaces incorrect versions with correct Microsoft versions.More Information about SFC scan can be found in this document:Description of Windows XP and Windows Server 2003 System File Checker (Sfc.exe)http://support.microsoft.com/kb/310747Hope this helps.Thanks and Regards:Shekhar S - Microsoft Support. Visit our Microsoft Answers Feedback Forum and let us know what you think. If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.