bhai merey paas lenovo laptop core i5 hai just 2month pehley lia hai orignal window hai is main pichley kuch din se masla aa raha hai.woh yeh ke yah chalta chalta screen off karta hai lekan jo file khuli hai woh khuli hi rehti hai sirf net disconect ho jata hai.pehley bhi ek dafa yeh hoa tha main ne window ko refresh kar dia tha yahni is ka ek alag button hai window ko reinstall karne ka main ne kar dia phir kuch bilkul theek chala aaj phir yeh problem ayi hai