Before buying a new laptop (see your other post) I'd use the system recovery offered by Sony to go back to factory conditions. Then it's as fast as it was when you bought it and (apart from hardware issues) the webcam will work also again.
By the way, you do realise, I hope, that external drives are rather unreliable. So - unless you have a good backup - you have a good chance of losing all pictures you store on it (I don't dare to use the word 'save'). Storing data (like pictures) on your hard drive doesn't slow down the laptop, so using an external drive as storage only is needed if your internal hard disk is too small (and then you need a second external as backup). And even then a bigger internal hard disk is much cheaper than a new laptop.
Kees
I have had my laptop for a while now, but of late it seems to be so slow. I keep the software up to date, I lost the use of the web cam and can't seem to rectify that, but my main concern is that it seems to be so slow. I am a photographer and use photoshop, Lightroom and silver light, and when editing it is so slow, or comes up with 'not responding' - as you can imagine when you have to edit hundreds of photos it's very frustrating and time consuming. The photos I do put on my computer are saved on to an external WD book so I don't clog it up, but it is still so slow.
I have had it for a while now, any ideas on how to speed things up or to use it as a coaster?
Thanks

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic