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For systems getting long in the tooth, (even if just a little) I would try Debian and maybe SliTaz. Or for a 'buntu, I would try Kubuntu 11.10 Oneiric Ocelot or Ubuntu Lucid Lynx.

I would suspect the ATA cable.

It's a real bad Fdisk bug. It always worked fine with another program to partition the HDD. I noticed this problem (or similar) back in 2002 when I got a Maxtor 4D080H4 80 GB.

Intel processors, at least since Pentium 4, self-underclock if the temp is measured to be past roughly 85 C on the processor.

Looks like it's not even recognized, even when it's Windows 2000. Like it thinks the OS is way too new lol.

I gotten word that a throttling processor can cause the OS to report high CPU usage percentage. (When it self-underclocks because of reaching close to 90 C) The heatsink may not even be all the way on the chip. (more common with the darn 775 push-pin heatsinks than with a 478) Or a lot of dust.

With the Award BIOS on Dell Inspiron 530S and Dell Vostro 200, "RAID" is AHCI. The BIOS menu calls AHCI "RAID" lol.

Looks like a bad HDD. Slow booting is likely a symptom of a bad HDD.

It's not 2006, so 3.5 is almost nothing. Roughly 3.5 is likely stock with many processors now lol. It's amazing how far we are with processors now.

I just encountered malware on my sister's laptop not long ago. It has Vista 64-bit. When I let it load, then I can't use new applications, because I get a pop-up saying that (filename) cannot be executed. (for every .exe file I try to run) Does this sound familiar? And if I open Task Manager early, I can kill the malware process. The process name looked suspicious, had random characters. Then System Restore worked and I was able to get it restored to a date in 2010.

I would replace the DVD-RW drive. Why would you do so? I am 100% confident that my suggested solution is gonna work. Sounds like the drive may be bad, because you also reported it hanging, then displays an error about it being corrupted. Especially if all new burns fail with the same symptoms.

I would replace the DVD-RW drive.

Gives error 403 when not logged in. I find this a little strange. (acts more like a message board attachment than the usual YouTube behavior)

That error is often because your processor isn't working correctly. (overheating core(s) can cause this error.) (or you're overclocking your core(s) and you need more Vcore)

Probably missing AHCI driver.

Likely causes: 1: Bad telephone line. 2: Bad cat cable. 3: Bad modem. And 5 KB/s =40 kbps!

That's a typical fascist 'tude! (When corrupted executives don't get their way all the time!) People flat out lying about not censoring need to keep their mouths zipped.

Looks good on HD Tach.

This seems to be true with my Acer Aspire M5630. IDE mode did NOT cap it to UDMA 133. Hooray. (ICH 7?) (2007) With my Asus P5QL Pro, IDE mode seemed to cap it to UDMA 133! (ICH 10) (2008) Yours is looking good!

That's a problem! That will cause ScanDisk to report tons of bad clusters on the HDD after about 50 percent! And ScanDisk will claim impending hard disk failure. (if your partition is bigger than about 60 GiB!) The only work around is to HPA your HDD to cap it at 64 GB or less.

That occurs 99 percent because the PC crashed, the PC was hard powered off or you pressed the case reset button.

QFT.

Windows 2000 was just EOL'ed in 2010! Bummer!

That looks like the problem I had when using HFSLIP with HFCLEANUP, with XP in the past. (HFSLIP with HFCLEANUP resulted in Windows Setup failing to even recognize at least pretty much all Microsoft drivers as Microsoft drivers.) (HFCLEANUP is no longer supported) That sucked. This may occur again when adding custom stuff.

I suspect throttling because of overheating core. Intels lag on purpose when past a certain temp, part the the Intel processor thermal protection.