net framework 4 causing slow startup

Dempsey

Doing a clean install of windows xp and im in the process of installing .net framework 4 and all its updates. I've noticed that its causing startup to be delayed by about 90+ seconds. I've since this on other installs but never could isolate the problem but I now know that its this program causing the issue?

Anyone have further information on why this is happening? Any solution to the problem? Do I need .net framework 4? Why is 3.x and 1.x available to install when I have 4.x installed?

Alun

Just leave it be for a while and it will sort itself out. There's a background process called mscorsvw.exe that does some work after a .NET install or upgrade that just needs to finish what it's doing.

There is a way however to force it to do all it's work in the foreground and get it out of the way in one go, see here ...

http://answers.microsoft.com/en-us/windows/forum/windows_7-performance/mscorsvwexe-using-50-of-my-cpu-windows-7-home-sp1/65ab9d28-4c51-457e-9158-4bedc5d09e42

Dempsey

Its not a process hooging the CPU's time, its the computer doing nothing for 90+ seconds, this happen me on other machines and it left me scratching my head.

Found this solution online last night and it sorted it out

just going to "services.msc" and switch "Microsoft .NET Framework NGEN v4.0.30319_X86" from auto startup to "disable" or "manual" ....

I switched it to manual, the next boot up was normal, no delays.

Alun

Glad you got it sorted, however mscorsvw.exe and the service you mentioned are actually the same thing. It's odd that it's causing you problems though since it should just notice that it has no work to do and then just exit. Both the x86 and x64 versions on my machine are set to "Automatic (Delayed Start)" and cause no problems on startup and are currently not running.

I use the ngen.exe executequeueditems command to get it to finish whatever it's doing. That usually solves any slowdown issues.