hi tim,
thank u for ur reply.
1.I waited for more than 20 minutes,but there is no progress,and the black screen remains the same.right click on the black screen (desktop) is also not working.
2. No error message is displayed on the screen.
3.There is no disk errors.
And there is no killing of explorer process,there is no display of taskbar and desktop background on startup and there two explorer.exe process is running.
Appologies, I couldn't get on line yesterday due to business concerns.. I'm ususlly don;t leave people hanging like that.
So...
Follow-up's
Did you try my last two suggestions,
defragmentation and
SFC /SCANNOW.
Also I agree with Cpt.Jack, a check for Malware and Virus' is called for (just to be on the safe side)
New Stuff
Another option that we hadn't discussed was replacing the explorer.exe with the one on your installation DVD, you'll need to do this from
SAFEMODE. But please run the SFC first.
What really interests me is why there are two explorer processes running. In windows XP this most likely would be your issue. However Windows 7 allows this to happen and you can set processes to run as separate instances on the exe's shortcut properties (advanced area). But the question is why?
So lets look into that. type MSCONFIG into search and open up the program. On the first screen select 'selective start-up' and then click on the 'startup tab'. This shows the programs that boot at start up (with the exception on those in the *run* areas of the registry and the startup folder/s (we can talk about those later). Disable (by un-checking) any processes that are not fundamental to windows booting. If you are unsure you can google the process, or post a picture here. Pretty much, I leave on my sound drivers, antivirus, Windows Operating System, tv card, graphics card, language filoes, office, java, and the default manager. I turn off - Printers, toolbars (including BING), adobe, google update, and anything else not microsoft. If you;re unsure leave it on and post the exe name here.
Also download this software called
process explorer, with it you may be able to see what is causing both explorers to open.
There are some other less likely scenario's and the other start up areas to check, but i've written a fair bit tonight. So lets look at the above first.
Tim