Hello, I'm a noob and I should never mess with my computer ever again (just a short mental note I should remember). Anyway, I overclocked my computer to 2.7 Ghz (I got Intel 2.4 processor) and it worked fine. Then, when I overclocked it to max (3 Ghz or more, dunno how much was it) and when I turned on computer, I got blank screen on my monitor and long beep (probably for overheating). I read on the forums how to fix the problem and I did reset BIOS using jumper and I could get into BIOS, clock was back to normal. The problem is that I can't start my Windows nor Linux. When I try to boot Windows, I get nothing, just a black screen (and I got restart once) and when I try to boot Linux i get message: - - System halted. I removed CMOS battery to reset BIOS (or whatever the hell that battery is for) and nothing changed. Also, I tried to re-install Windows by inserting Windows disk into my CD-ROM and installation booted but it got frozen and I had to restart computer. I have no idea what to do! Any help will do :)

"I have no idea what to do!" First, you need to tell us the exact manufacturer and model number of your system or motherboard. We have no idea where to start. Skip

The first thing I'd do is go back in, and make sure every connection is good and solid. But I'm clumsy and I tend to disconnect a drive when playing with jumpers.

Sorry for that :) Intel 2.4 Ghz\ Motherboard: ECS L4VAX2 1.5GB RAM (i think it's DDR( Windows on 40GB Maxtor HDD Ubuntu 9.04 on 160GB WD HDD Asus 7600GS Graphic card

Look in the bios for the boot order of your HDDs-do you know which drive the boot loader for Linux is on ? You might try changing the boot order. Also, are either or both drives sata ?

Linux is my main OS and it's on the first HDD and it's set like that in BIOS, haven't set anything for the other HDD where I have Windows, I boot it from GRUB menu (god, I'm a noob). Both HDDs are ATA.

When you boot to the first HDD, does it give you a boot menu for Linux and Windows ? I'm also curious what happens if you change the boot order to boot from the second hard drive. It sounds like you have some other problem, though. It would help if you could be more specific about your cpu and ram.