Please capitalize where necessary: before you can open a weap file, you'll need to figure out what kind of file the weap file extension refers to.
A: Before you can open a WEAP file, you'll need to figure out what kind of file the WEAP file extension refers to.

Please capitalize where necessary: all slings are approved for 250 kg - custom slings to 350 kg can be delivered
A: All slings are approved for 250 kg - Custom slings to 350 kg can be delivered

Please capitalize where necessary: such an unexpected death after such a short illness aroused deep sentiments of affliction and sorrow.
A: Such an unexpected death after such a short illness aroused deep sentiments of affliction and sorrow.

Please capitalize where necessary: oemhelpins.dll program freezing and system crashing: important system components such as cmiv2.dll and advapi32.dll become abnormal.
A:
OEMHelpIns.dll program freezing and system crashing: Important system components such as cmiv2.dll and advapi32.dll become abnormal.