Updates fail due to insuffcient rights

I've been having an issue with software updates in Windows 7 on one of my Windows 7 PCs. This might be the wrong forum, becuse I think it is a rights issue, but it manifests itself on updates, so...

Some Windows 7 updates and all of my Adobe Reader and Itunes software updates fail to install because they do not have the proper level of access to the folders required. Every time I have this issue, I run the Take ownership on teh folders that cause dthe issue and try again. Sometimes this takes several attempts until I get all of the necessary folders. Eventually, I either get it to work or fail miserably and have to jump through hoops to remove the software (Adobe & Apple) and re-install it from scratch, which generally works as long as I can remove the software or manually tweak the registry successfully.

I've also noticesd that I can't create IE favorites through IE. I have to copy the address and navigate through Windows Explorer and create a new shortcut that way.

Can anyone help me figure out what went wrong? Why do I not have admin rights required? Why does Take Ownership give me the rights I need only temporarily?

1.Uninstall all 3p security software
2.Try both methods to reset permisssions

a)
How do I restore security settings to the default settings?
(apply method for Vista)

b)
Security Restore 0.2.7.273 | Rizone3

3.If really nothing help I can suspect infection too - use Windows LiveOne Care to diagnose your system Windows Live OneCare safety scanner: Free online tool for PC health and safety

Thanks for your help. I tried method A, which seemed to fix my problem. It gave me the correct rights level to everything existing. I am now able to create favorites, perform upgrades, etc.

One wierd thing though... .Net Framework, Silverlight, and Adobe Reader were left in bad states by my rights issues prior to attempting the fix. I needed to re-install Adobe Reader. When I did that, I didn't have rights to the new directories that it wanted to create. I did a Take Ownership in the parent directory for the 3 new new folders the install wanted to create and was able to finish the install successfully. Besides that, everything seems great. I tried method B to see if it would fix my install rights issue, but it didn't.

I don't appear to have any virus issues.