Reinstall Ubuntu just asking ?

[NawafLol]

i'm using ( Duel boot ) i had a nasty bug with my ubuntu and i want to reinstall it !

so just asking how ? and if it will effect my windows

i have my ubuntu cd so can anyone help me !

[Partyboi2]

When you reinstall choose the "Manual" Partitioning option when you get to the partitioning stage and choose to edit your Ubuntu ext partition, then reset the mount point to / and choose the file system for that partition usually ext3. Then tick the box to format that partition.
If you have a separate /home partition reset the mount point for it to /home But do not tick the box to format it.
Then continue with the install, reinstalling Ubuntu should not effect your windows install.

[NawafLol]

can i reinstall but without no data lost !

[Partyboi2]

If you do not have a separate /home partition you can create one following this (http://www.psychocats.net/ubuntu/separatehome). The advantage of having a separate /home partition is that all the data like your documents, videos, music, user settings etc... are untouched if you ever need to reinstall.