I was also having a problem with Windows
Explorer and IE hanging sometimes. I tried to run  the repair on Internet
Explorer (in Add/Remove programs, if you try to uninstall IE, a popup will
appear asking you if you want to repair it).

When running the repair, it failed, saying "cannot find scrrun.dll". Searching
the net, I found a site  that I could download this file  from, and then I
registered it with the command "regsvr32 c:\windows\system\scrrun.dll".

Now my IE seems to be much faster and my original problem with Millers Lab, is
now working.

Would you happen to know what the sccrun.dll is for? Still learning. Anyway,
thanks for all of your nice and responsive help.