Day Trip from London to Windsor

I followed the instructions in the RS London guide to get tto Windsor and it was super easy! It’s true that if you go on your own, you can take your time and spend as much time there as possible. See St George’s Chapel where Harry and Megan got married and where the queen is buried. I was there last in 2018 and they were building a concession stand inside the castle walls for refreshments. If it’s not open there’s lots of pubs and restaurants in Windsor town itself. You can easily spend a whole day there. We even took a Duck tour which was an amphibious vehicle that went from land on to the river. It was a lot of fun!
Check out the Long Walk which you always see on TV where the royals come out and greet people. I don’t have a suggestion for a tour guide but I’m sure you’ll get advice from the helpful folks on this forum.

London Walks has a tour of Windsor and Eton. It is currently suspended but it may be run in May.

https://www.walks.com/our-walks/windsor-castle-eton/

If they don't run it, you could arrange for a private tour with them.

I'd go with taking yourself to Windsor on the train and picking up the free multimedia guide to tour the castle. I've used the guide both at Buckingham Palace and Windsor Castle (pre-covid) and they are very good. Plus you can take your time and see what interests you and skip things that do not.

https://www.rct.uk/visit/windsor-castle/practical-information#/#multimediaguide

IF London Walks has a tour then I'd be happy to do that one as well. Their walks are very good quality.

Another vote for going sans tour. It is an easy trip and visit. Also well worth it.

You have received excellent advice already from other forum members.

To answer your specific questions....
"Questions: anyone aware of a tour just to Windsor?"--No, except for the London Walks tour mentioned by Frank and Pam.

"If I took the train from London, are guides available at the castle to take tourists around and provide the history?"--No.

"Other than the castle, are there any sights in the town itself that are note worthy?"--Yes. Windsor is a lovely small town with medieval and Georgian buildings.

The Windsor Guildhall, where Charles and Camilla got married in April 2005, was completed by the famous Sir Christopher Wren in 1689.
It's worth seeing. It's on the High Street.

Also in Windsor: pubs and restaurants serving good food.
You could walk over the bridge to Eton.
There are boat rides available on the river.

Someone upthread mentioned "See St George’s Chapel where H&M got married and where the queen is buried."
St George’s Chapel is within the grounds of Windsor Castle, and is the burial place of kings and queens of many different time periods.
Look for the grave marker in the floor of King Henry VIII.
In his burial chamber (same hole in the floor) are also his Queen, Jane Seymour, and King Charles I who was beheaded.

You certainly don't need a tour. I did it myself, bought the audioguide and if you are outside, there could be some of the guards that were wonderful to chat with-got a wonderful picture with two of them.

After you can take a tour of the surrounding town, which is lovely and even stop in a teashop for a cuppa.

Just do it yourself, it's easy-peasy.

The church of St John the Baptist is also worth finding. Look for the mayor’s chair half way down the nave and the lovely 1605 memorial to Edward and Elinor Jobson and their six sons, including a baby and four daughters.In the chancel, look for the carved stone angels round the base of the roof, and the Royal pew on the right of the chancel complete with two thrones given by Princes Augusta, the daughter of George III who regularly worshipped here.

Eton is a short walk across the river.

No tour is needed. Take a train there switching to a little local train at the end. Easy.

Just a quick note to say that there are two different train routes from London to Windsor. The recommended one is from Paddington station to Windsor & Eton Central, changing at Slough. The alternative route from Waterloo to Windsor & Eton Riverside doesn't require a change, but is much slower and less direct.

not only is the Waterloo route slower and a significantly longer walk up the hill to the castle it is also more expensive than the Paddington one...

having an alternate can be handy in case of operational difficulties, but be aware that the tickets on the two lines are route specific and not interchangeable.

I just did a daytrip to Bath and it worked out splendidly. It's a 1.5 hour easy train ride out of Paddington. Oddly on this website Rick says it's a great daytrip but it's not listed at all in his London guide.

You can probably find the details in his GB book, or you can read up on the trip and watch a video courtesy of the Man in Seat 61. You do not need a guide and wouldn't benefit much from one, it's quite straightforward and you can easily figure out what there is to see. There was a brief wait to get into the baths and no wait to get into the abbey.

We didn’t take a tour to Windsor any of the three times were visited the castle. On our last trip we took the train from London and it was unfortunately a day when somebody decided to jump in front of the train from an overpass. Essentially, what should have been an easy train ride wasn’t. We had to change trains and ultimately took a taxi the last couple miles. The return went well, but because of all the cancelled trains during the day, we were packed in like sardines returning to London. If I remember correctly there was a guide who provided information, but it was only outside the castle, not inside. Our day trip to Bath by train was flawless.

You were very unlucky jaimeelsabio - in 70 years of traveling on the trains in GB, this has never happened to me...

Take the train from Paddington Station in London to Windsor, you will have to change trains in Slough, it’s simple. From London to Windsor it’s a 35 minute ride. When you arrive in Windsor, exit the train, turn to your left and walk up to High Street and you will see the castle.