I have an Acer Aspire 1551-5448 that have Windows 7 dual-booting with Ubuntu 10.10. Been messing around with Ubuntu too much that it broke. I find it annoying when after configuring a static IP address for the
eth0, the network-manager icon went missing. Managed to fixed that, had something to do with the function (Fn) keys turning off the Atheros wireless card, making it unable for me to view and select available wireless networks. Figured I should start over and finally use the next LTS release anyway. Well, after doing two wrongs (I accidentally wiped out the Linux partition), Windows 7 could no longer boot. Instead, I get the following on boot.
error: unknown filesystem grub rescue >
I could spend some time reading more about Grub 2 and the unfamiliar commands but I remembered that I created a System Repair Disc after burning the system recovery media long ago. Saved me some time. Read this forum http://answers.microsoft.com/en-us/windows/forum/windows_7-system/when-i-boot-i-get-the-following-msg-error-no-such/6b2a2d89-9e9c-4fcb-89bb-7cad29046fbb and used the following commands and steps
bootrec.exe /fixmbr bootrec.exe /fixboot bootrec.exe /RebuildBcd
Closed the command prompt, clicked Startup Repair, restarted the netbook and Windows 7 was then able to boot. I did not see the Grub menu so this allowed me to go ahead and reset/resize the partitions and reinstall Ubuntu. Used 12.04 LTS this time.