If you have the OEM license key from off the laptop (likely under the battery or on the bottom-face), you can install windows from any OEM disk. Bear in mind that most of the major manufacturers have their own special little tools they like to install with the OS - Dell, Lenovo, Sony & Dell are all infamous for their additional bloatware. You may or may not have to contact Microsoft to activate windows - I have had to in some cases and not in others. Make sure you select the correct version of Windows (Home Premium, Pro or Ultimate) based on your license because it is specific to the version. x86 vs x64 does not matter, but the version does.
Good luck