How HIV Infects a Cell. HIV is a retrovirus, which means it carries single-stranded RNA is its genetic material rather than the double-stranded DNA human cells carry. Retroviruses also have the enzyme reverse transcriptase, which allow it to copy RNA into DNA and use that DNA copy to infect human, or host, cells.When HIV infects a cell, it first attaches to and fuses with the host cell.Then the viral RNA is converted into DNA and the virus uses the host cellâs machinery to replicate itself during a process called reverse transcription. The new copies of HIV then leave the host cell and move on to infect other cells.hen HIV infects a cell, it first attaches to and fuses with the host cell. Then the viral RNA is converted into DNA and the virus uses the host cellâs machinery to replicate itself during a process called reverse transcription. The new copies of HIV then leave the host cell and move on to infect other cells.
The Brother Printer drivers are out-of-date. Outdated drivers will cause bugs. Your Brother Printer Drives are corrupted or missing, especially when you install other software programs, or when you upgrade Operating Systems, like update to Windows 10 from Windows 8.1, Windows 8, Windows 7, Windows XP, or Windows Vista.nstall/Add a Local Printer. Connect the printer directly to your computer. On your computer, click the Start button and select Devices and Printer. In the pop-up window, click Add a printer.
I have a strange problem. The first page I print after turning on the Brother HL1040 printer is great. Afterwards the pages have gray and black streaks from top to bottom. If I turn off the printer, wait a few minutes, and print out another page, it looks great. But subsequent pages have streaks.