Could be a fungus like Vladimir said, could also be an insect egg or just dirt on a bit of fluff. However, I'm more concerned with how dusty the leaves are. I may just be dust or it could be the beginnings of a spider mite infestation. It's a good idea to wash off the leaves from time to time, like maybe every 4-6 weeks. Take them outside and hose them off, or if that's not possible, put them in the shower and shower them off with cool water. Then let them drain well and put them back where they were. It helps prevent spider mites as they're attracted to dusty plants. And your plants love the rinsing off!

Short of high-end gaming mice, there really isn't much off a difference in terms of performance for the average user. I'd stick with Logitech or Microsoft and, as with most things, avoid buying the cheapest model(s). Beyond that, pick the one that feels most comfortable in your hand. You'll likely need a free USB port, although some mice do come with a USB to PS/2 adaptor (PS/2 is the little round plug). Read the package for details. Frankly, I'd skip installing whatever software the manufacturer supplies, usually it adds a bunch of "features" few use and Windows usually can recognize a mouse without any additional software. Turn off your computer, unplug the old mouse, then plug in the new mouse. If you go with a cordless model, don't forget install the batteries. :-) You may need to "sync" the mouse with the base, usually by pressing a small button on the bottom of the mouse.

First are you comfortable that your computer is not infected? Windows 7 has self repair features. Click Start click Control panel click Find and Fix problems, this is under the System and Security header In the new window click Configure a Device click Next in the new window and the computer will run a series of tests, hopefully finding your issue. Also you might check the Device manager click Start click Control panel click System and Security click Device manager under the System header. Here you are looking for yellow question marks or exclamation marks, especially the keyboard.

When you give a mouse a cookie .... That's what happened to us. Kitchen remodel - check. Replace the knob and tube wiring in the whole house to the tune of $18k - check. Bump out the back of the kitchen to move the laundry room inside - check. Stucco the bumped out kitchen - check. Landscape the back yard because the new windows in the bumped out kitchen look over the back yard - check. Build a wrought iron fence and haul in loads of crushed granite to keep the dogs in one portion of the yard and not tear up the new landscaping - check. Add more flagstone patio to connect the existing patio to the new bumped out kitchen - check. Paint the brick on the outside of the house - check. Go ahead and paint all of the window trim and wood work around the house - check. Replace the garage doors because the new bump out of the kitchen went into the posts of the garage - check. Get the flagstone guys to install brick over the new stucco on one side of the house so it all matches on that side - check. Rip up the carpet and refinish the original hardwood floors in the DR, LR and hallway - check. Enjoy it immensely - check A year and a half later, start it all over again with bathrooms. And reworking every closet in the whole house. And repainting the whole house. And repairing and making the 75 yr old painted doors look new. And adding insulation. And on and on and on. It was suggested before we ever started to tear the whole thing down and start from scratch. It may have been cheaper. :)