The Linux install installed another boot manager. If you remove Linux I often find these to fail to boot.
Go get EASYBCD and research how to boot it from CD, USB and learn about it's boot repair features.
My computer has a 320GB hard drive which has both Win7 & a Linux distro on it. After I installed the Linux OS I found that I prefer Win7 & will never use it so I want to delete Linux & remove the added partitions. Can this be done without corrupting Win7 or doing a complete reformat &, if so, how? Thanks!