i am trying to install windows xp service pack 3 onto my Acer Extensa 5510 notebook laptop for the last 2 weeks...but seem to fail every time. There was an 80gb hard drive in it already but the windows on that kept freezing at the same point, every time it loaded to a state where i couldnt even move the mouse, was working perfectly fine before. So i decided to install a brand new 200gb hard drive so i can store more of my work in it. Once installed, i inserted the windows xp sp3 disk, and formatted the hard drive to ntfs (quick) and then the files started to copy, once that was done, it restarted and the actual installation part started. it went from 39 minutes down to 35 minutes and froze on the installing devices part. i thought it was a common error so i restarted the setup. this time it went to 34 minutes and froze. i restarted setup again, and it went all the way down to 8 minutes and froze. i restarted the setup one more time, and it got stuck on 35 minutes again. for the rest of the day, most of the times it would get stuck on 34/35 minutes and either froze or restarted the laptop for no reason. Only once, it went down to 23 minutes and froze. only 2 out of 30 tries went past the install devices section. In the setupapi.log file, it always said a different .inf file was causing a problem each time i restarted the setup. i think one of them was a cpu.inf file...and another was to do with the audio. i didnt bother deleting the cpu.inf one because i found out that it was the drivers for the cpu and was an important system file for the setup. Inserted windows vista install disk and started the setup, it gets stuck at the green bar after the "windows is loading files" bit. this happened with all 3 of the vista install disks i have and also same thing happened with the recovery disk provided with the laptop (also vista). Inserted windows 7 install disk and started the setup, and it got stuck at "expanding windows files" at 54%. When i restarted and tried the setup again, it hanged at the "Starting Windows" screen with the logo. On trying a third time, it got stuck at 68%, also at "expanding windows files". All the windows install disks are genuine. No copies. Full Specifications are: Intel Core 2 Duo Processor T5500 (64 bit) (1.66ghz, 667mhz FSB, 2mb L2 Cache) 15.4" WXGA Acer CrystalBrite LCD (16ms) Intel Graphics Media Accelerator 950 DVD +/- RW drive 200gb Fujitsu Hard Drive SATA 1gb DDR2 RAM, (2x 512mb sticks) Built in 802.11 a/b/g wireless Lan someone please help me out...really need to get coursework done this holiday and hate going local library as i only get one hour max there to use a computer (yes i shouldnt have decided to do it at the last minute...i learnt my lesson) your help will be much appreciated and will remember you always as the one who helped fix my laptop.