keyboard and mouse windows problem

[MouadovskyMouadh]

need a little help, after i installed a new operating system (windows 8.1) in another partition now i get two operating system old one (win 7 ) and new one win 8.1 when i choose win 7 now keyboard and mouse light out and are not responding in win 7 , in win 8 they work perfectly , any adea guys?

 

[Placebo]

1, There's an existing general PC questions thread here.
2, the obnoxious font isn't needed, we can read.
3, Win7 has poor driver support, Win8 is better at detecting your hardware and finding drivers (or using generic drivers) and it's all round a better OS anyway so you may as well stick with it.