I have had this problem before, but i have always been able to fix it, but now for some reason i cant.
Every now and then when i click to start Limewire, it pops up a screen and says windos is browsing for it. Well, to fix it i had to go to Add/Remove Programs and repair it but now when i try to, it gives me some error numeber when i click change/remove and then says Access Denied. Can anyone help me?

It might well be worth uninstalling it & starting over. But update your Java BEFORE re-installing LW: Java 1.5 (take the JRE)

And also delete the LW Preferences folder called .limewire (whilst LW is closed!) & found here: Windows NT 4.0 / 2000 / XP: C:/Documents And Settings/your_username/.limewire OR Windows 98 / ME: Your .limewire folder is in "C:\My Documents" (BUT make a note of all your LW settings 1st, b/c after you delete the LW prefs folder you'll need to reset them.)

It may also be worth defragmenting your hard disk drive.

if i re-install, would that be like repairing it and i will get back all of my previous downloads?

Uninstalling will not disturb your LW downld folder/incomplete folder. However you should maintain the same setting for Downld folder location. If that was set at default then leave it at default. Your downloads prefs are called download.dat & bak & are located in the incomplete folder. These should never be tampered with or removed.