Rootkit.Trojan in operating memory

I did a system scan of my pc and all my drives are clean except for operating memory which has a trojan and nod32 is unable to clean it

I tried running scan frm safe mode but it take ages

Any solution would be appreciated.

NOD, for some reason, can't clean memory trojans with ease. The only thing I remember doing once is continuously restart my PC whenever it asked me to. Avira did the same, but it took a lesser number of restarts with Avira.

If I format my HD completely

Will it remove the trojan in the operating memory?

You only need to reinstall Windows to get rid of the trojan. You will, however, need to scan your PC for viruses though.

Got RID of this trojan