Solution : "Windows cannot be installed on this disk. The selected disk is of the GPT partition style."

"Windows cannot be installed on this disk. The selected disk is of the GPT partition style."

Method #1:
1. Boot up to installation DVD/CD.
2. Click install but don't follow through.
3. Press SHIFT-F10 to bring up console.
4. Type "diskpart"
5. Once inside diskpart type:
  -> list disk (find the one you want to convert)
  -> select disk 0 (select the one you want from the list)
  -> convert mbr (should take a second or two)
  -> quit
6. Continue with install

Method #2:
1. Boot up to installation DVD/CD.
2. Click install but don't follow through.
3. Press SHIFT-F10 to bring up console.
4. Type "diskpart"
5. Once inside diskpart type:
  -> list disk (find the one you want to convert)
  -> select disk 0 (select the one you want from the list)
  -> clean (wait an hour or so until its done)
  -> quit
6. Continue with install