Working on a Sony lap top, which had Vista originally installed on it. Operating system was updated to Windows 7 Home premium from an upgrade disk. Worked fine for many months. Now it seems there is a problem with the operating system. Would like to repair using the install disk, but I believe the system was updated to SP-1 . Looked at slipstreaming Sp-1 to create an updated disk, but read that the created disk would not work to repair the system files. Could anyone shed any light on what would be a way to repair the current system.