Formatting all partitions in win7

I have a fujitsu sh531 notebook with win7.I have formatted win7 for the first time.At some point it asked me which drive to format.There were partitions 4 partitions:

1 WINRE 2GB system
2 system ~500gb logical
3 HDBR_DRIVER 5gb oem (reserved)
4 HDBR_OS 13gb oem (reserved)

I formatted only second one not to mess things up but if its ok i want to format all of them in case of malware.

My question is what are these partitions used for and is it ok if i format them?

 

btw i have a dvd for drivers

 

help pls

 

I asked to double check because i am afraid to mess up my new pc.

I wiill format all partitions then.