thanks i understand now.
Just one more... in place upgrade keeps all files, settings, and programs.
So if i do custom install then what will happen to all files i got on computer?
That depends, if you choose custom install but do NOT choose to FORMAT the partition your files will be put in a folder called windows.old. Don't trust this backup regardless!!!
If you choose to format the partition the files will be destroyed.
This all only applies to files/programs on the partition you install W7 to (eg. C:/) other partitions should be safe but it is better to assume the worst and back up anyway.
It gets a little confusing here but you can clean install with a format and upgrade media. You will need a qualifying OS installed (not necessarily activated) or I believe simply having the disc for a qualifying OS available to insert when prompted. There are many threads about this but the definitive answer eludes me I think it's a pinned thread in the windows seven installation forum. And i don't think were far enough along towards GA to be sure what is rumor and fact.I expect that someone will correct me if I'm mistaken, but I beleive that you aren't permitted to format the partition if you enter an upgrade license.
If memory serves, and it's like Vista, you could format if you didn't enter a license key, but that would leave you with no qualifying OS on the partition.
That depends, if you choose custom install but do NOT choose to FORMAT the partition your files will be put in a folder called windows.old. Don't trust this backup regardless!!!
If you choose to format the partition the files will be destroyed.
This all only applies to files/programs on the partition you install W7 to (eg. C:/) other partitions should be safe but it is better to assume the worst and back up anyway.