dual booting on windows 8: how do i delete an os?

hammy434

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Feb 10, 2013
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hey everyone, ive got a windows 8 laptop (asus n550jv) and recently it was behaving a bit slow even though its got an i7 (everything was quite slow, and i ran performance test and literally everything was about 3x slower than before. cpu from about 8000 to 3600, so i thought wtf is going on here). i decided it was going slow because of the windows 8.1 update and i thought "lets just put windows 7 on it. it works with everything and is the easiest option." well after reading loads of articles and finally getting my 7 cd to boot i got a gpt error or something. i decided the error would be fixed if i formatted the drive my os was on. it didnt fix it. so i decided to get a windows 8 disc and install that, and that worked well. it was a windows 8 pro upgrade disc but sadly i got normal windows 8 and not windows 8 pro. but at least it automatically activated. anyway sorry for all that probably unneeded information. anyway now when i boot my pc (or i think it might only be when i restart, not 100% sure) im given 2 options for os's to boot: "windows 8 (on volume 4)" or "windows 8". the "windows 8 (on volume 4)" is the one which works. the "windows 8" one just attempts to repair the computer and fails (theres no os...). how do i delete that one? also might i note my friend told me i should also delete the partition with the os on after i format it and then partition it again. could that effect it? its not a major thing, but just a bit annoying when i boot my pc and have to click on windows 8 for it to boot. anyway if anyone can help id be grateful. thanks.
 

Windows Key plus 'R'
type msconfig then enter
Choose Boot tab and you should see two entries for Windows, select the unwanted one by clicking on it and delete.