How long is screw top red wine still good to drink after purchase?

I have a number of bottles of red wine with screw-tops which I purchased at the beginning of the year. It was 'value for money' purchase admittedly. Can I still drink it? I suspect there is a problem with it. Does the temperature of where it was stored affect such stuff also? (I stored the bottles in a room which gets quite high temperatures)|||The high temperature could destroy your wine. Nowadays, even some good wines use screwtops or artificial corks because there is a shortage of the real thing.





Here is an article I wrote with more information:





http://www.associatedcontent.com/article鈥?/a>|||Until it tastes horrible