Almost all apps will leave registry trails, and possibly cached files. It's a pain to remove then without using those softwares that you mentioned junk systems.
And on DLL Hell, even besides that, Windows 95 and 98 got junked for me because they were just so unstable. I could not stand to use them for actual work. XP got really slow for me after a year in a sterile environment, so I put the system away and bought a PowerMac G4 to replace it. Only my current Windows 7 box has not slowed down.
I have never installed cleaners, I use Intranet email almost 100% of the time so I do not get that kind of spam mail. Windows Server 2003 is a different use case. Programs are not being installed and uninstalled constantly. Different use case, different environment. I wasn't trying to say that if you Let a Windows box sit idle for a year it will slow down.
And on DLL Hell, even besides that, Windows 95 and 98 got junked for me because they were just so unstable. I could not stand to use them for actual work. XP got really slow for me after a year in a sterile environment, so I put the system away and bought a PowerMac G4 to replace it. Only my current Windows 7 box has not slowed down.
I have never installed cleaners, I use Intranet email almost 100% of the time so I do not get that kind of spam mail. Windows Server 2003 is a different use case. Programs are not being installed and uninstalled constantly. Different use case, different environment. I wasn't trying to say that if you Let a Windows box sit idle for a year it will slow down.