Browser 20/20 appears to be a data base tool http://beyond2020.com/index.php/news/27-beyond-20-20-releases-professional-browser-and-publisher-s-edition-7-1
File sharing (although it refers to win 7 it is the same for Vista) http://www.it.cornell.edu/security/howto/filesharingwin7.cfm/#file
I can see no infection on the system so it may just need a quick tidy up and defrag. You may also want to disable some of the Acer start up programmes
Clear Cache/Temp Files
Download TFC by OldTimer to your desktop
[*] Please double-click TFC.exe to run it. (Note: If you are running on Vista, right-click on the file and choose Run As Administrator).
[*]It will close all programs when run, so make sure you have saved all your work before you begin.
[*]Click the Start button to begin the process. Depending on how often you clean temp files, execution time should be anywhere from a few seconds to a minute or two. Let it run uninterrupted to completion.
[*]Once it’s finished it should reboot your machine. If it does not, please manually reboot the machine yourself to ensure a complete clean.