I have a Microsoft Wireless Comfort Keyboard 1.0A and a Microsoft Wireless Optical Mouse 2.0A on a Windows XP computer with IntelliType and IntelliPoint 5.2 installed for drivers. Whenever I plug in the wireless receiver (there is only the one for the two devices) the screensaver will not come on. I have tried plugging the receiver into a different computer and I do not have the same problem. I have plugged different keyboards into the problematic computer and do not have the same problem. I have clicked preview in the screensaver options and that works fine. Any help would be greatly appreciated. Thanks in advance.