and 2nd same problem is bcoz of this is..... when i keep a wallpaper on my pc screen..
after some minuts wallpaper is gone ... and same black backgroung appears.. ?
may be this problem is too bcoz of services?
_mustaffa786_ is right, Your coy of windows is not genuine, in other words Illegal, you must purchase a genuine Version.
and as for the error 711,
This issue may occur if the following services are disabled: - Telephony - Remote Access Connection Manager - Remote Access Auto Connection Manager
To resolve this issue, enable the disabled services, and then start the services: 1 Click Start, right-click My Computer, and then click Manage. 2 Double-click Services and Applications, and then double-click Services. 3 Right-click Telephony, and then click Properties. 4 On the General tab, click Manual next to Startup type. 5 On the General tab, click Start under Service status, and then click OK. 6 Repeat steps 3 - 5 for the Remote Access Connection Manager service and for the Remote Access Auto Connection Manager service.