I have never seen any good come out of compressing files. If you have a backup use it if not I would boot off of the install disk and do a repair. Worst case do a re install. Please do not compress files.
Oh I see you have no recovery disks. ACER should have supplied one to you when you purchase it. If they did not, contact them or you will have to purchase a Vista DVD.
Edited by GTK48, 14 March 2009 - 11:06 AM.