Please capitalize where necessary: original swiss m-57 bayonet with leather sheath 1
A: Original Swiss M-57 Bayonet with leather sheath 1

Q: if your pc opens the sel file, but it's the wrong application, you'll need to change your windows registry file association settings. in other words, windows is associating sel file extensions with the wrong software program.

A: If your PC opens the SEL file, but it's the wrong application, you'll need to change your Windows registry file association settings. In other words, Windows is associating SEL file extensions with the wrong software program.

Q: vii) details of frequent flyer programme, if any
A: VII) Details of frequent flyer programme, if any

Problem: so you obviously so inspired, you just do put up next year - and we look forward to seeing you!
Can you repeat this sentence, but capitalize it?
Answer: So you obviously so inspired, you just DO put up next year - and we look forward to seeing you!

Text: the balenciaga the first baby handbag is crafted of soft leather and is decorated with stylish antique looking chrome toned accents.

Correct capitalization: The Balenciaga The First Baby Handbag is crafted of soft leather and is decorated with stylish antique looking chrome toned accents.

Q: you will have a truly unforgettable bachelor party, company's dinner or what ever your event might just be about!
A:
You will have a truly unforgettable bachelor party, company's dinner or what ever your event might just be about!