some of the problems i faced and solved on installing games in my new laptop

i have been surpassed so many problems on installing games in my new laptop so far.
now iam overcame some of them.initially i faced crc errors which means some of the files have been corrupted. then later on i came to know it cannot be solved.
then i faced physx problem after installing mafia 2,then i solved it by installing latest physx driver from nvidia;then the problem not solved yet; when i launch the game a black screen appeared and crashed on start up,then i fixed the problem myself by installing correctly.
then i faced an issue with doom3.after installing the game