To those who feel the OS is too sluggish for your liking, I'd recommend doing a clean install of Windows 7. Simplified to the 3 steps below:

1. Use the Acer eRecovery to create:
-The recovery DVD (3 DVDs): these DVDs will help you restore your system to factory default state, in case you screw up anything.
-The Application/Driver DVD (1 DVD): this DVD will contain all the drivers and applications from Acer (including bloatwares like games)
-This whole process will take about 1 hour+

2. Use ABR (Activation Backup and Restore)
-This will backup your Windows 7 key (different from the sticker below the laptop) and the Activation Cert
-Save these files to a flashdrive and you will need to 'apply' it to activate your freshly installed Windows 7 later

3. Perform a fresh install of Windows 7
-If you have a Windows 7 64 bit DVD, then it is easy - just boot from the DVD and install Windows the usual way
-If you don't have a Windows 7 64 bit DVD, then there are ways to get it.
-This whole process will take about 30-45 minutes

Note: I am not responsible for any damages to your system that may result from following this guide

1) reinstall firefox
2) ???
3) if more info, can help u identify and solve problem...

if u wanna keep the log in screen, you can copy it from: C:\Windows\System32\oobe\info\backgrounds

then, after fresh install, restore it manually using this link

and I guess you don't get the serial key ?