What are you running? Win 98 or Win XP?
I used 98 till 2004
because I hated XP, along other problems (lack of music in DOS games) it did have obnoxious UI features, you know. Yellow dog that prevents you from searching your files if you don't click some bullshit. Pop-up on inserting removable media : "do you want to play videos / browse it / destroy it / automatically run a virus?"
But I installed Windows Server 2003 and it was marvelous : it's a version of XP configured to look like Windows 2000 (but with XP's icons), most all crap disabled, and IE6 unable by design to download .exe files and run scripts.
Later I knew to configure XP in the same way (except IE), it was marvelous too, since it was post SP2 and my PC ran it incredibly fast. Flexible enough with control panel, tweakUI, gpedit.msc and then third party tools and .regs.
But now I run linux. I was giving it away already on computer refurbishments and repairs, so I ate my own dog food. It's worse than Windows. But, Windows is worse than Linux.
If I were a millionaire I'd buy Server 2012, do a Core install (base system with no GUI), look at what can be done and build up from it. Maybe something other than explorer.exe can be used.
Also, a Xen set up with Windows run in a VM with a real graphics card is possible.
Using win 8 for the last week or so. The kernel seems good, reasonably quick and low memory footprint. Alttab & ctrlaltdel do lag sometimes though. One thing is that's bugged me if an apps taking 100 I should be able to kill it instantly (been a bit spoilt on the Mac cause it does react instantly but windows still lags) I installed paint.net and had to reboot machine wtf. I can't uninstall update windows modules. I've tried to disable it but it ignores my request. I've rebooted the win8 machine maybe 20 and about 15 of those I've gotta wait until it installs windows modules. Pita I turn the machine on and can't us it for 1/2 hour.
Lately I think this is the biggest issue with Windows, it's a reboot fest!, this may partly be why SSD are so popular.
In the 9x/XP days, I just didn't do updates, which is unthinkable today - malware just targetted IE and machines not behind a router, when that didn't work so well anymore they switched to real attacks and exploits.
You can kill stuff from the command line. Dunno if there's still the taskkill command in cmd.exe, nice to force kill stuff (with the /F switch), though force killing processes is not nice if you can regularly kill them
(not that it matters : force kill that offender if your convenience is more important)
Note that it shouln't be any different than using the task manager to kill, it's just a different UI.