enrico1970:
I'm still here (read my posts above) and trying to find a way out.
At this moment, I can tell you and everyone else this:
I start a new fresh windows 7 install on a new pc.
Create 2 user accounts
Config the intranet settings, and web access using my proxy server
install Office 2007
run Windows Update several times
Install kaspersky Internet Security 2010 (I thought this was causing the issue)
and everything work just great, without a single issue of D+P empty window (tried every twice or more after some and every step always after reboot)
Last Friday, I install a network plotter to use with AutoCad (Not installed yet) HP DesignJet T1100 (using windows update drivers)
Reboot and I have no trouble (Twice)
Reboot and select the other user (not the one of the Windows install or even the HP install) and I get a D+P empty window.
That was late in the evening, and I have no time to explore the issue at that time (btw I get VERY MAD).
Today (after 2 days holiday) I went back to that PC, and when I was able to get the window populated again, I simply Delete the HP T1100 plotter.
After Reboot (several times in both user's) I get the window populated all the times.
I'm still not sure if the plotter is the problem, or the plotter drivers of course, but some more tests will show me some more results.
I'm remembering back when I bought the T1100 plotter in 2007 to have strange issues with it in Windows XP. Users with it installed, disappear from the Network neighborhood after some time (1 hour or so after startup) and were not available in the network
for the rest of the day. Only PC´s with the plotter installed have that behavior. I report to HP at the time, but after some months of callings, I give up. Maybe some 3 drivers versions ahead the problem was gone and I could install it in XP with no more troubles.
Anyway, ONLY after a fresh Windows XP install the original drivers did not cause the issue. Installing new ones over or removing the initial drives from the printers server didn't work.
This is my story by now.
Next is yet to come...
PM