Network connections (peer to peer) from Windows 7 (RC) to Windows XP and Windows 2000 fail, if date and/or time on both computers are differing too much. In the moment I could not find out, how much deviation is allowed. Sometimes it works with even 1 hour difference, but sometimes network access fails even with 10 minutes difference. Took me some time to find out, why I was asked for the input of my credentials, even if I already saved them. And access was always denied, even with the right credentials. After correcting the computer time manually, I could access Win2k and Win XP again.Usually I run a small batch-file with the NET TIME command in it, to synchronize time with one of my computers (Win2k). This works fine with Win2k and Win XP. In Windows 7 I got this script running by disabling User Account Control. But if the machine's time is too much deviating from the "master's" time, then network access is denied and I cannot get the right time from the master - and the I cannot access the network.Note: The master synchronizes time with a Time-Server in the internet.Has somebody an idea, how to solve this problem? Thanks a lot!

Usually that means the clock on the mother board is probably bad if your time is drifting that much. Have you checked that? You could also increase the frequency Windows 7 syncs with the time server by way of a simply registry hack.The user can increase or decrease the frequency of updates by making a simple registry change. Add or change the SpecialPollInterval DWORD setting. Note the value is in seconds...HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\W32Time\TimeProviders\NtpClient\For example the value is set to 3600 on my Windows 7 and XP machines (that's in seconds), so the machines poll the time server once each hour.MS-MVP Windows Desktop Experience, "When all else fails, read the instructions"

Hi, If Al Jarvi is right about the motherboard, it most likely to be the computer running Win2k . The motherboard might need a new cmos battery. Before you change it, take a note of the bios settings. Slan go foill, Paul