Thanks once again and this has been a very difficult learning curve indeed. I thought I had done the right thing by installing electrum onto my usb stick however I guess that didn't go far enough? No one has had access to my computer nor usb (for those of you who asked.) The only thing I can think of is someone must have compromised my laptop and accessed my seed on a document somewhere within the files of my laptop? I bought bitcoins when they were only at $120 and today I am left with a big fat zero. I don't think I will be dealing with bitcoins ever again. This is the second time I lost coins, once via MTGox and now this. C'est la vie......Thank you everyone, you have been very supportive and helpful indeed. For that I am appreciative.

luigi2169 there is almost no chance to get back your coins-but maybe you can help others with some additional information,do you use any security software on your PC/do you download some program/file from internet in the last few days?
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Hi Lucius, I use Malwarebytes premium edition and in my last scan shortly after discovering that the coins had gone missing it showed that there was no threat/virus/malware? Like I mentioned, I kept my wallet on a pen drive/usb. I am at a loss as to what happened?

Thanks for your tips so far. I kept the wallet on a USB which is what makes it even stranger? I only used the USB periodically to check that my bitcoins were still there. I did a full Malware scan using Malwarebytes and they did not find any Malware. I use a subscription version of Malwarbytes and not the free version. I am at a loss as to what happened?

Recently I opened up my Electrum wallet only to see that ALL my bitcoins have left my account! I can see a minus sign next to my bitcoins showing that they have left my wallet. The light on the bottom right is green and is fully synched. I have NO idea how this happened as I did not check my wallet for over 10 days and these coins disappeared 3 days ago. I have checked on blockchain.info and managed to find an address where my bitcoins have gone to. I believe that my system (Windows 7) has been compromised and someone has stolen my bitcoins. Please, if anyone can assist me in retrieving my bitcoins, I will offer a handsome reward. Thank you.

Thanks once again. Please excuse my ignorance however what do you mean by posting the "TX?" What I don't understand is that my wallet is on a USB which I kept  in a safe place. The transaction took place two days ago and my USB was no where near the laptop? Could it be possible that electrum did a "wholesale" transfer of my coins during the bitcoin gold fork? I know that bitcoin gold is going through some teething problems. Btw it is a substantial amount.

Thanks, I did a malware scan and it reported no malware. I am very worried indeed. Surely there must be SOME way of finding out where the coins went to? I have the hashtag and the address it went to.

ALL my coins have disappeared! I have version a 2.9.1 Electrum wallet on a pen drive and when I logged into it today, it showed that my balance is at ZERO! I can also see a transaction in red whereby ALL my bitcoins have left but I cannot see where they have gone when I click on 'sent.' I NEVER transferred my coins out! I also downloaded version 2.9.3 and even restored my wallet with my seed and still, my balance shows as zero. I just checked my address on blockchain.info and can see that all my coins have been transferred to an address. How can I identify the source of the address? PLEASE can someone assist me? Thanks. If anyone would like to know the address it my coins went to, I would HAPPILY supply it. Thieves!